Four-tower rectifying method for producing biodiesel from waste grease
A technology for biodiesel and waste oil, applied in the field of four-column rectification, can solve the problems of high requirements, unsatisfactory product quality, unsatisfactory biodiesel purity, etc., and achieve the effect of enhancing competitiveness and strong competitiveness.
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[0019] (Example 1)
[0020] The four-column rectification method for producing biodiesel from waste fats and oils includes the following steps:
[0021] Step 1: The reacted crude methyl ester is continuously entered into the first tower for rectification to produce C14 and light fatty acid methyl esters; the reacted crude methyl ester is heated to 190-200°C by heat transfer oil before entering the second column One tower, in the first tower, a forced circulation pump is used for circulating heating, and the temperature in the tower is controlled at 215~225℃; in the first tower, the content of C14 and light components in the crude methyl ester and the content of C16 in the output are controlled The output, to ensure that the content of C14 in the first tower is less than 0.5%, and the content of C16 in the output of C14 and light components is less than 2%. According to the characteristics of my country's waste grease, the proportion of C14 and light components in the crude methyl ...
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